Q61 / 90 · JEE Main 2021 (27 Aug Shift 1) · Physics

Calculate the amount of charge on capacitor of $4 μF .$ The internal resistance of battery is $1 Ω :$

A
$4 μC$
Correct answer
B
$8 μC$
C
$16 μC$
D
zero

Solution

Using $i = \frac{5}{4 + 1} = 1 A$

$∴ V_{A B} = i \times 4 = 4 V ∴ V_{A C} = V_{C B} = 2$ Volt

$∴ q$ on $4 μ F = C V_{A C} = 8 μ C$

Hence, the correct answer is option: 'B'.

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